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d="scan'208";a="145268940" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Feb 2025 06:45:46 -0800 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi , Arun R Murthy Subject: [PATCH i-g-t 3/4] lib/igt_kms: add function to set link params Date: Tue, 18 Feb 2025 20:31:20 +0530 Message-Id: <20250218150121.2132934-4-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250218150121.2132934-1-kunal1.joshi@intel.com> References: <20250218150121.2132934-1-kunal1.joshi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" add function to force link rate and lane count for given output, install exit handle to set auto at exit Signed-off-by: Kunal Joshi Reviewed-by: Arun R Murthy --- lib/igt_kms.c | 33 +++++++++++++++++++++++++++++++++ lib/igt_kms.h | 2 ++ 2 files changed, 35 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index 0ba1afb08..bc46487c5 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -7269,6 +7269,39 @@ void igt_reset_link_params(int drm_fd, igt_output_t *output) drmModeFreeConnector(temp); } +/** + * igt_set_link_params: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * set link rate and lane count to given value, also installs exit handler + * to set link rate and lane count to auto on exit + */ +void igt_set_link_params(int drm_fd, igt_output_t *output, + char *link_rate, char *lane_count) +{ + bool valid; + drmModeConnector *temp; + + valid = true; + valid = valid && connector_attr_set_debugfs(drm_fd, output->config.connector, + "i915_dp_force_link_rate", + link_rate, "auto", true); + valid = valid && connector_attr_set_debugfs(drm_fd, output->config.connector, + "i915_dp_force_lane_count", + lane_count, "auto", true); + igt_assert_f(valid, "Unable to set attr or install exit handler\n"); + dump_connector_attrs(); + igt_install_exit_handler(reset_connectors_at_exit); + + /* + * To allow callers to always use GetConnectorCurrent we need to force a + * redetection here. + */ + temp = drmModeGetConnector(drm_fd, output->config.connector->connector_id); + drmModeFreeConnector(temp); +} + /** * igt_backlight_read: * @result: Pointer to store the result diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 7227f0b0e..31b9820cb 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1271,6 +1271,8 @@ bool igt_has_force_link_training_failure_debugfs(int drmfd, igt_output_t *output int igt_get_dp_pending_lt_failures(int drm_fd, igt_output_t *output); int igt_get_dp_pending_retrain(int drm_fd, igt_output_t *output); void igt_reset_link_params(int drm_fd, igt_output_t *output); +void igt_set_link_params(int drm_fd, igt_output_t *output, + char *link_rate, char *lane_count); int igt_backlight_read(int *result, const char *fname, igt_backlight_context_t *context); int igt_backlight_write(int value, const char *fname, igt_backlight_context_t *context); -- 2.25.1